The CentOS project itself called Greg a founding member in a blog post interviewing him in 2019, well before the Red Hat/CentOS events in December 2020.

https://blog.centos.org/2019/03/greg-kurtzer-centos-founder/

For what it's worth, The Register refers to Greg as a CentOS founder in their first Rocky article:

https://www.theregister.com/2020/12/10/rocky_linux

If you have some references to back your assertions, I would very much like to see them. You're not the first person I've seen assert that Greg shouldn't be called a founder of CentOS, but I've yet to see that backed up.

Also, you seem to minimize the non-technical, especially legal, work around setting up and maintaining a distribution, but I don't understand why. In terms of legal work, trademarks need to be registered, non-profits need to be set up to fund critical items like build infrastructure, and more. Each of these seems like exceptionally valuable, if not critical, to the success of a distribution.